| startsWith {SparkR} | R Documentation | 
Determines if entries of x start with string (entries of) prefix respectively, where strings are recycled to common lengths.
startsWith(x, prefix) ## S4 method for signature 'Column' startsWith(x, prefix)
| x | vector of character string whose "starts" are considered | 
| prefix | character vector (often of length one) | 
startsWith since 1.4.0
Other column_func: 
alias(),
between(),
cast(),
endsWith(),
otherwise(),
over(),
substr()